The inimitable baseball player and manager Yogi Berra famously said, “It ain’t over ’til it’s over.” In the Maine art world, we have many vibrant examples of this maxim. Alex Katz and Lois Dodd are one year away from the centenary of their births. William Irvine is 95, Richard Estes 94, and Josefina Auslender and Alison “Wooly” Hildreth are the nonagenarian “newbies” at 92. All are still painting and exhibiting, and none shows any sign of “retiring” from creating art. Katz’s “Dancing with Reality” retrospective has just closed at Germany’s Kunsthalle Tübingen, and Colby College in Waterville is currently featuring...